Four top rows: spectra of Si IV 1394 Å , Si IV 1403 Å, and C II 1336 Å of the five selected A to E CBs. Bottom left and right panels: example of multi structures in CBs along the slit: Mg II h and Si IV 1394 Å  respectively profiles in the CB B: B1 identical to B for y = 59 arcsec (pixel = 374) (solid line), B2 for y = 59−0.33 arcsec (pixel = 372) (dashed line), B3 for y = 59 + 0.5 arcsec (pixel = 377) (dashed-dotted-dotted line), with profiles outside the bomb (y = 61.5 arcsec (pixel = 389) − dashed-dotted line). The bright spectra with a large blue shift below B is not considered as belonging to CB B. The Si IV 1393.76 line blue wing is ragged by two absorption lines (Fe II at 1392.2 Å) and Ni II (1393.3 Å) for CBs A B, and D. Intensity units are in (erg s^-1 cm ^-2Å^-1sr^-1), wavelengths unit is Å.